MC68332AMEH20 Freescale Semiconductor, MC68332AMEH20 Datasheet - Page 59

• Manufacturer Part Number: MC68332AMEH20
• Description: IC MCU 32BIT 20MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68332AMEH20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Type: ROMless
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 132-QFP
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Controller Family/series: 68K
• No. Of I/o's: 15
• Ram Memory Size: 2KB
• Cpu Speed: 20MHz
• No. Of Timers: 1
• Embedded Interface Type: QSPI, SCI, UART
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Data Ram Size: 2 KB
• Interface Type: QSPI, SCI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 16
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Package: 132PQFP
• Device Core: ColdFire
• Family Name: 68K/M683xx
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TCR1P — Timer Count Register 1 Prescaler Control
TCR2P — Timer Count Register 2 Prescaler Control
MC68332
MC68332TS/D
EXTERNAL
TCR2 PIN
SYSTEM
TCR1 is clocked from the output of a prescaler. The prescaler's input is the internal TPU system clock
divided by either 4 or 32, depending on the value of the PSCK bit. The prescaler divides this input by 1,
2, 4, or 8. Channels using TCR1 have the capability to resolve down to the TPU system clock divided
by 4.
TCR2 is clocked from the output of a prescaler. If T2CG = 0, the input to the TCR2 prescaler is the ex-
ternal TCR2 clock source. If T2CG = 1, the input is the TPU system clock divided by eight. The TCR2P
field specifies the value of the prescaler: 1, 2, 4, or 8. Channels using TCR2 have the capability to re-
solve down to the TPU system clock divided by 8. The following table is a summary of prescaler output.
CLOCK
TCR1 Prescaler
TCR2 Prescaler
00
01
10
11
SYNCHRONIZER
00
01
10
11
INT CLK /8
32
4
Freescale Semiconductor, Inc.
Divide
For More Information On This Product,
DIV32 CLOCK
DIV4 CLOCK
By
DIGITAL
FILTER
1
2
4
8
Divide By
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1
2
4
8
Number of
Clocks
0 – DIV32
1 – DIV4
128
256
PSCK
MUX
32
64
PSCK = 0
A
B
Internal Clock Divided
(T2CG CONTROL BIT)
CONTROL
MUX
0 – A
1 – B
Rate at
16 MHz
16 ms
2 ms
4 ms
8 ms
By
16
32
64
8
PRESCALER
00 1
01 2
10 4
11 8
TCR1
PRESCALER
TCR2
00 1
01 2
10 4
11 8
Number of
Clocks
External Clock Divided
16
32
4
8
0
0
PSCK = 1
TCR1
By
1
2
4
8
PRESCALER CTL BLOCK 1
TCR2
MOTOROLA
PRESCALER CTL BLOCK 2
16 MHz
Rate at
250 ns
500 ns
1 ms
2 ms
15
15
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